Fig. 5: A hypothetical model for a self-regulating edge-based cell-wall-sensing module.
From: A self-regulatory cell-wall-sensing module at cell edges controls plant growth
(1) RLP4s are transported from the TGN/EE to the cell edge through RAB-A5c-mediated trafficking. (2) RLP4s are stabilized at the cell surface though interaction with a cell wall ligand, and the association of RLP4s with the cell wall is sensitive to changes in cell wall mechanical status. RLP4s that are not cell wall associated are endocytosed, thus providing a concentration-based system for cell wall sensing. (3) Surface-localized RLP4s associate with an as-yet-unidentified RLK to form a signalling module, among whose targets is RAB-A5c-mediated transport itself.
